Leon teale



vnarran srariis Param? err-iron.

LON TEALE, F NEW YORK, N. Y.

FUSE.

1,321,949. Specication 0i Letters Patent Patented Nov. 18, 191%.

Appucation inea June 12, 1919. serial No. 303,555.

To `all whom, t may concern.

Be it known that. I, LEON Turin. a citi- 'zen ot' the United States, and a resident of i New York city, in the county of New York and IState of New York, have invented certain new and useful Improvements in Fuses, of which the following is a specification.

, This invention relates to electrical cartridge fuses and particularly to that type in which the fuse element may be readily removed and 'replaced when desired or a new one'. inserted'when the previous one melts or burns out. In such constructions there is commonly provided a' cylindrical body ofinsulation material with metallic caps or other terminals' connected within the I body of the cartridge by the fuse element.

It has been proposed to provide the peripheral wall of the cartridge with a slot or aperture through which-the' new fuse may be 'inserted and secured in place and which slot`may be covered by an outer sleeve having a corresponding' slot which Amay be I brought into, or out of registry with that in 4the cartridge one does not take hold of the sleeve and therefore is not liable to rotate it. I also provide as an important feature of my invention, simple and efficient means for operating this internal sleeve and locking it in closed position so as to pre-vent. any

.jarring, vibration,A or handling of the fuse from opening up the cartridge.

In the accompanying drawings to which reference is to be had, I have illustrated one-. embodiment of my invention although I do not wish to be limited to this particular form except in so far as deined in the appended claims.

In these drawingsz Figure 1 is an elevation of the! device, the cartridge being closed.

Fig. 2 is a. view similar to Fig. 1 but show ing the cartridge open, small portions being broken away to show certain details of construction.

Fig. 3 is an View with the cartridge open.

Fig. -fl is an end View, and Figs. 5 and 6 are transverse sect-ions on the lines 5 5 of Fig. and 6--6 of Fig. 3, respectively.

In the specific form illustrated. the cartridge or casing includes a cylinder 10 of fiber 'or other suitable insulation material closed at its ends by metallic caps 12. The caps include end walls which may be perforated, if desired, as shown in Figs. 4'. 5.

and 6, and cylindrical Walls into which the apertures in the 'lugs or terminals'lfl. The

fuse thus connects the two caps 11, 12 and these may be so constructed as to directly .i

engage with the sockets or other terminals between which the fuse. is to be inserted. I have shown the lugs 14 lforn'ied integral with blade terminals 17,17 as is common in this general type oi cartridge fuse. These blade terminals may have shoulders abutting against the outer surface of'each end wall and may have portions swaged or riveted over into engagement with the inner surface of the end wall of the cap to hold the. parts rigid' in respect toJ each other. This constitutes no portion of my invention and may `lbe modied within wide limits. The lugs 14 may.' be of any suitable construct-ion adapting them to rece-ive or vhave attached thereto any suitable form of commercial replaceable fuse.

'Ihc insulation casing 10 has an aperture 18 extending the' full length between the two caps and of width equal to one-fourth or one-third of the periphery of the casing. Vvlithin the casing I provide al sleeve 19 also of' fiber or other insulation material and having a slot or aperture 2O extending lengthwisc thereof and of approximately .the same.. width or circ-un'itcrential extent as the slot 1S. This inner sleevemay be rotated to bring the slots into registry as indica-ted in Figs. 2 and 5 or to bring them out of regisvtry and close the casing as indicated in Fig.

1; When this internal sleeve is rotated to open position, the screws 16 are readily accessible and the fuse 15 may be removed or a new one readily inserted. \Vhen the sleeve is moved to closed position, only a comparatively small amount of its external surface is exposed. Thus in grasping the cartridge b v the center portion to insert the blade terminals in their sockets, there is very little liability of rotating the sleeve to open position.

such position that 'when the screw is at one "closed as shown in Fi 1.

end of the slot, the apertures 18 and 20 will be in registry as shown in Figs. 9. and 5 and when at the opposite 'en ds ofthe slot, they will be out of registry and the casing will be The screw 22 may have an ordinary s ottedarounded head which is suiiicient for the application of lateral pressure to rotate the sleeve. -WVith the 'sleeve in closed .position,`the"qperator may givethe screw 22 a. partial turn which will bind the head againstthe outer surface of the 12-and effectively hold the sleeve against any accidental return rotation by jarring or vibration..` The= screw may, if desired, be'normally keptpartiallyl tightened so that it will give a frictional resistance and prevent the free rotation of the, sleeve but permit of such rotationwhen sufcient lateral pressure` is applied to the screw without rotating the letters Sofar as its functions as :xn-operating means is. concerned, projectingmembers other than' the screw 22 might serve the same purpose.

Having thus described my invention, what I claim as new and desire oo seeureby Letters'Patent is: I

1. In an electricfuse of the cartridge type, the combination of a cylindrical shell having an aperture therein, capsat each end of An electric fuse of the cartridge type,

having a cylindricalrasing of 'insulation material, caps telescoping with and receiving the ends of said casing, terminals secured to ythe end walls of said caps and projecting inwardly, a fuse connecting said terminals, a .sleeve within said casing, said 'sleeve and casing having apertin'es which may be 4brought into and out of registration upon the rotation of said sleeve, and a member secured to said sleeve and projecting through said casin for rotating vsaid sleeve.

3. A cartridge iii wallpf insulating material, having a longitudinal aperture and a cireumferentially extending slot, a sleeve within said casing having a longitudinal aperture adapted to se having cylindrical be brought into or out 'of registration with the aperture of said casing, an operating member secured to said sleeve and projecting through said slot, caps closing the opposite ends of said casing, and a fuse within said casing and detac'hably secured to said caps.

4. A cartridge fuse including a cylindrical Wall of insulatingn material havin an aperture extending along one -side thereof, and a circumferentially extending slot adjacent to one`end, a sleeve Within said wall' and having a longitudinally extending aperture adapted tobe brought into or out of registration with the aperture of the wall, a screw ext-ending through said slot into said sleeve and adapted to serve as an operating member to rotate said sleeve and when `tightened serving to lock said sleeve in adjusted position, caps closing the ends of' said cylindrical wall, and a fuse detachably secured to said caps,the securing means being accessible through said apertures when the latter are in registry.

Signed at New York city, in the county of New York and State of New York, this 11th day of June, A. D. 1919.

:LEON TEALE. i 

